<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>引入css代码</title>
    <!--
    href:加载的那个文件
    type:指定了加载文件里代码为css代码
    rel: 指定是css
    -->
    <link href="css/css01.css" type="text/css" rel="stylesheet">
</head>
<body>
<div>我是div</div>
<div>我是div</div>
<div>我是div</div>
<div>我是div</div>
</body>
</html>